OS X install disks: black versus gray
Hi:
We have a PowerBook G4 15" that is currently running OS 10.3.9. I would like to upgrade it to OS 10.4.x or 10.5.x.
Looking on E-Bay for system software disks, there seem to be two kinds of disks for sale, one set that is black and one set that is grey. Can anyone explain the difference between these disks?
I have heard that grey are system specific and sometimes needed for installation on a particular piece of Apple hardware. If this is true, why did Apple sell the black disks? Or can I purchase a set of the black disks and be confident that they will function to upgrade my PowerBook?
Thank you!
OS X Yosemite (10.10)